The following features are standard in every shell. Note that the stop, suspend, jobs, bg and fg commands are only available on systems that support job control.
Bash common features

The following features are standard in every shell. Note that the stop, suspend, jobs, bg and fg commands are only available on systems that support job control.
To run a specific task or list of commands repetitively on bash script , you need to use on of this three constructions : for , while , until . Each one fits different situation as we will know now.